/*
 * Copyright (c) 2001-2007 Sun Microsystems, Inc.  All rights reserved.
 *
 *  The Sun Project JXTA(TM) Software License
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *
 *  2. Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *
 *  3. The end-user documentation included with the redistribution, if any, must
 *     include the following acknowledgment: "This product includes software
 *     developed by Sun Microsystems, Inc. for JXTA(TM) technology."
 *     Alternately, this acknowledgment may appear in the software itself, if
 *     and wherever such third-party acknowledgments normally appear.
 *
 *  4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must
 *     not be used to endorse or promote products derived from this software
 *     without prior written permission. For written permission, please contact
 *     Project JXTA at http://www.jxta.org.
 *
 *  5. Products derived from this software may not be called "JXTA", nor may
 *     "JXTA" appear in their name, without prior written permission of Sun.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
 *  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 *  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SUN
 *  MICROSYSTEMS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 *  OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 *  EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  JXTA is a registered trademark of Sun Microsystems, Inc. in the United
 *  States and other countries.
 *
 *  Please see the license information page at :
 *  <http://www.jxta.org/project/www/license.html> for instructions on use of
 *  the license in source files.
 *
 *  ====================================================================
 *
 *  This software consists of voluntary contributions made by many individuals
 *  on behalf of Project JXTA. For more information on Project JXTA, please see
 *  http://www.jxta.org.
 *
 *  This license is based on the BSD license adopted by the Apache Foundation.
 */

package net.jxta.impl.cm;

import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import java.util.logging.Logger;
import net.jxta.impl.cm.SrdiManager.SrdiPushEntriesInterface;
import net.jxta.logging.Logging;

public class SrdiManagerPeriodicPushTask implements Runnable {

    private static final Logger LOG = Logger.getLogger(SrdiManagerPeriodicPushTask.class.getName());
    
    private SrdiPushEntriesInterface pushNotifier;
    
    private boolean stopped = true;
    private boolean publishAll = true;
    
    private long pushIntervalInMs;
    
    private ScheduledExecutorService executorService;
    private ScheduledFuture<?> selfHandle;

    private String handlerName;

    public SrdiManagerPeriodicPushTask(String handlerName, SrdiPushEntriesInterface pushNotifier, ScheduledExecutorService executorService, long pushIntervalInMs) {
        this.handlerName = handlerName;
        this.pushNotifier = pushNotifier;
        this.executorService = executorService;
        this.pushIntervalInMs = pushIntervalInMs;
    }
    
    public void start() {

        if(!stopped) return;
        
        Logging.logCheckedFine(LOG, handlerName, ": Periodic Srdi delta push starting, delay = ", pushIntervalInMs, "ms");
        
        stopped = false;
        publishAll = true;
        selfHandle = executorService.scheduleWithFixedDelay(this, 0L, pushIntervalInMs, TimeUnit.MILLISECONDS);

    }
    
    public void stop() {
        
        if(stopped) return;

        Logging.logCheckedFine(LOG, handlerName, ": Periodic Srdi delta push stopping");

        stopped = true;
        selfHandle.cancel(false);

    }
    
    public void run() {

        try {

            Logging.logCheckedFiner(LOG, handlerName, ": Pushing ", (publishAll ? "all entries" : "deltas"));
            pushNotifier.pushEntries(publishAll);
            publishAll = false;

        } catch (Throwable all) {

            Logging.logCheckedSevere(LOG, "Uncaught Throwable in SrdiPushTask",all);
            
        }
    }

}
